Load-regulated brake mechanism.



H. H. FORNEY @a 0. B., SGHENKY.

LOAD REGULATED BRAKE HEGHANSM.

APPLIUA'LIOH .FILED AUG.12.1908.

2 SHEETS-SHEET 1.

1 l A l I I l a I lx y www WM E. H. FGRNEY 0. B. SGHENKY.

LOAD REGULATED BRKE MEGHANISM.

APPLIUATION FILED AUG.12,1908.

AIITN ESSES .UNITED sTATEs PATENT OEEIOE.,

HENRY Ii. roRNEY, or sin FRANCISCO, AND OTTO CALIFORNIA.l

'n soHoEN KY, or BURLiNeAME,

LOAD-REGULATED BRAKE MECHANISM.

Specification of Letters Patent.

Patented May 4, 1909.

application inea August 12, 190s. ser'iaINoAiazso. l

vThis invention relates to luid v ressure brake mechanism' and niore partie arly to means 'for regulating or graduating the braking power in pro ortion-,to the load of weight of the car, an Inore particularly to means for increasing the brake power on loaded cars.

The objectof the invention is to automaticallyv raise the braking power of loaded cars and reducethe same on light or unloaded cars, so as to give uniform braking effects, maintain uniform auxiliar reservoir pressure throughout the train, tiereby in- 'suring uniform release of the brakes, revent or at least minimize the danger of s idding lfltrains, particularly when rimning down gradew ere a high brake percentage is rese'xquiredi'and without interfering in any way y e flexibility of the Operation of the brakes. f

`The invention, generally sneaking, comprises the combination of tio usual fluid pressure brake cylinder, together with a relief vent therefor and means controlled by the load or weight of tlic car for controlling said relief vent.

a d'agraminatic view showing in plan thd under frame of the car Vwith the improved brake mechanism applied thereto, par-ts being shown in horizontal section; Fig. 2 is a diagrammatic View showing those parts in side edevation; and Figs. Sand 4 arevertical sections vtaken transversely of the bolster on different positions.

tlieline' 3%3, Fig. 1, showing the parts in The' invention is 'applicable to arailway car of any type or construction.

The drawings show a typical form' ofV metal underframehaving center sills 1; side sills `2, lbody bolster 3 andtransverse ties or .beams *4.1 'This underl'rame is' supported upon'the truck bolster -5 which at 'itsends is -lprovided with illingblocks 6 resting on theA I caps 7 of the springs-8 shown supported in a diamond or arch bar truck frame 9. These parts, however, have been merely selected to illustrate the ap 'lication of the invention, but without intending to limit the i vention to any particular forni of car or truck frame.

The car will be provided with automatic iluid pressure brake mechanism of any standard type. Aln the drawings only a portion of such brake mechanism is shown,nainely, the brake cylinder 11, cylinder lever 12, floating lever 13 and the usual connecting rods. As the invention has nothing to do with any of these parts they are not illustrated in detail nor will they be described.

The invention comprises certain additions to the usual fluid pressure brake mechanism and now to be described.

' An auxiliary cylinder 15 is connected with the brake cylinder llthrougli pipe 16 so that the piston- 17 of said ai-Ixiliarjf cylinder is at a/llv times subjected te the suine pressure as exists in the brake c i'liuder. 'lhis` piston controls an exhaust or relief port 1S, shown as formed through the walls of the cylinder and controlled direttl)l by the piston itself, although it is `obvious that the relief pori might be controlled indirecily from the piston, such as having a suitable ventvnbf'oy :irtuated by the `pistoni-Od 19; 'lhe pist-inruil 19 is connected to one end oi' the lever LZ() pir oted at 21 to the cai' traum-und lun ingr colinccted to its opposite ond the connor ing rod 22 leading .to the cross lever or equalizer 14. 'lho connecting` roc. 22 piclhrubli is provided with a turlibuciile '.15 for purposes of adjustment.

'lhe copializing lever 2eis guided by supporting bars 2G secured to the under-franw. Connected to each ond Ol' the equalizing lelvoil is a link or connecting rod 2T pivoted to the outer 0nd of crank arm 2S on a rotating member or shaft 2.) which is located between the spring cap 7 und the 'iilling block 6, said spring cap and 'filling block being suitably shaped to receive said rotating member 29. This rotating member or shalt is provided on one side with a projection orcaiu 3U arranged to. contact with the 'filling block and lift or tend to lift said lilling block and bolster when the connecting rod 22 is pulled.

`The operation ol the mechanism is as follows: `lilieirever the brakes are iluid pressure enters the bralefcy a plied and finder 1i it .2

also passes through pipe 16 inte the auxiliary Cylinder 5 and i'oreesth'eipiston 17 0ut- Wardly. This pushes-on the lever 20, swinging the same on its pivot and eausing'the same to' pull en the connecting rod 22 and f on the crank arms 28. This has a tendency to rotate.` the shafts or bodies- 29, thereby 4 bringingthe, cams .or projections 30 intoy eontaetwith'the lower faeesol' the filling Lblocks andftending to litt thel bolster. The parts are soproportioned that thepistonV ,tdoes not )nner-)ver the relief orexhau'st port 18l until ,they bolster is lifted; Itv isfobvious that it' thel paris light or unloaded it will require a ,eomparatively lon'v pressure to drivel the .pison y.17 ,overfsullieiently far to litt the bolster and ear body and open the relietI *rent VVVto theatmosphere, "n'liilei't the car is heavy y or loaded it will'require a much higher pr`es sure todrive the piston over to such position. When the pressure inthe brake cylinder falls below ,that which is sultieient to lil't the holster. and ear body, the piston 17 moves v.baekward and closes the reliel vent. Con- 12,3 sequently the amount el' pressure retained f in the brake ey'linder is regulated by the load4 or Weight ol' the ear bod),i or all that part el' the ear or trtiek above the springs.

`light-er braking etl'eetis obtained 'with light or. unloaded ears. r

ln this manner a high braking ell'eet; is obtained with heavy or loaded ears,` while a l brake Cylinder pressure and arranged to oon- 'neefthe regulating means, a1'nel"\','the rotating crank and am ufall'eeted by the jolting or up and down "movement ol' the ear body, but is unilorm at all times.

to; aduate the braking power to the weight ol'4 the eax-,thereby minimizing or entirely o\r'lerfoming the danger ot sliidding :ind 'llattening the Wheels and also maintaining 'Munil'orm auxiliary reservoir pr ure tl'rroutjh- `release ol the brakes and making it possible handle agreater number of ears in a train on lgrades Where aliigh brake percentage is required.

"iut the train and thereby'insuring uniform' 'By the mechanism deseriberl it is possible and vboth ends et the truck bolster and eontrolled by the weight of said bolster for resgulating the pressure in said Cylinder.

2. Load regulated vl'hud pressure brake Amechanism eemprisinpr in combination, a

brake eylinder, means' arranged to exert a lifting aetion simultaneously on both ends of the truck bolster, and meebz'inism controlled therebyv for regulating the pressure in said cylinder.

3. Load regulated ,fluid pressure brake mechanism eomprising in combination, a brake' eylinderya Cam member arranged to exert a lifting; action on the ear, nd means connected thereto for regulating the pressure in said eylinder.

4:. Load regulated iluid pressure -brake mechanism comprising in Combination, a brake cylinder, a earn member located between the bolster and truck frame and arranged to have a lifting action on the ear, and means emmeeted thereto for regulating' the pressure in said cylinder.

5. `Load regulated brake mechanism eompris-ing;l in combination, a blt-aliecylinder7 a relief port therefor, a piston actuated by trol said relief port, and meehanism unyieldingly ronneeted to said piston and arranged to exert a liftiitgr artion on the ear.

(i. Load regulated luid pressure brake merhauism comprisingin eombination, a brui-ie e'riinder, :t rrliel port. tllerel'o'r, a piston artuated by brake cylinder pressure andl arranged to rontrol said relietE port, and means eonneeted to said piston and arranged to exert a lifting :retion simultaneously on both l ends ol the. trueh bolster.

` lt is obvious that; various 'changes may be .Inside 1n the consti-notion and arrangement ol' tlieparts Without departintr from the spirit oi 3 tliefinvention. For instaure, the relief yvent therefrom, sueli as by aetuatingg :t separate i y v :tand r'omuellous betueen ,said ruin mem-ber "`,|'elii:f valve l'ro'm the piston rod; also tile (.:am

neerl'not. be controlled dii-eetl)Y by tlm 'piston l tween the bols-tel' :rml truoh yl rome Amembers"tirait befloeated r nu)Y point be- -intl elim-I on'llio ear bod).Y when the :urxillarjiy r-,ylinder is supplied 'with lluid pressure.. All

sueh modilieations are intended to be eovered by the elaims, as hereinafter worded.

7. lioad regulated lluid pressure brake mechanism romprising in ,eombinatioiu a brake cylinder, :t relief port. therefor, a piston actuated by brake veylinder pressure and rontrollingA said relief port, a eanr member arranged when moved to exert aliltirt; aetiou. on the ear, and eonneetions between said pis.- ton am1 ram member.

S. lioad regulated lluid pressure merliauism comprising in eombiualion, a

`brake r \'linder,a, piston aetuated 'by brake lf vlinder pressure :nd eonlrollmen relu-I port.v

ranged to exert :tlil'tine' notion ou the ear,

andpiston. Y

t). Load `reli'julalerl l lluidl pres-nire ln'nlumerlmnirnn Comprisingl in-eombiiisttioru :t brake i. ylind r, a. piston eeluutf-d b), bruin: '.ryliuder pressure and eont rollio; a. rrliel' port lorsaid brake cylinder, und rotary ram members between the ends el the trueli bolster brake' Y and the truck frame and arranged when rctated to exert a lifting action en the ear, and connections between said rotary earn meinbers and said piston.

l0. Fluid pressure brake mechanism cernprising; in eenihinaicn, a brake cylinder, a pisten actuated by brake cylinder vpressure and controlling a relief port freni the cylinder, rotary cam Inenihers between the ends ef the truck holster and truck frame and ar ranged te exert a lifting action en the car, cranks connected te said rotary cani ineinbers, an equalizing` lever connected to said cranks7 and means connecting said equalizing lever and piston; 11. Load regulated Huid pressure hrake mechanism comprising in combination, a brake cylinder, a piston actuated bv brake cylinder pressure and controlling a relief ort freni the cylinder, means between the en s of the truck holster and truck frame and arranged to exert a lifting action on the car, an equalizing lever connected te said means, and a lever and connecting red connecting said cqualizing lever with said piston.

In testin'icny whereof, we have hereunto set eur hands.

HENRY H. FORNEY. (YTO B. SCHOENKY. \l'itnesses:

MAX FliennAD'r, Tineo. C. lticn'rnn. 

